US20110120803A1 - Minimal lubrication device - Google Patents
Minimal lubrication device Download PDFInfo
- Publication number
- US20110120803A1 US20110120803A1 US12/952,444 US95244410A US2011120803A1 US 20110120803 A1 US20110120803 A1 US 20110120803A1 US 95244410 A US95244410 A US 95244410A US 2011120803 A1 US2011120803 A1 US 2011120803A1
- Authority
- US
- United States
- Prior art keywords
- lubricant
- conduit
- compressed air
- modular
- modular element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
- F16N7/30—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated the oil being fed or carried along by another fluid
- F16N7/32—Mist lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N25/00—Distributing equipment with or without proportioning devices
- F16N25/02—Distributing equipment with or without proportioning devices with reciprocating distributing slide valve
Definitions
- the present invention relates to a minimal air/oil lubrication device. More particularly, it relates to a modular device.
- Air/oil lubrication represents a relatively recent reality, and is the result of the introduction of advanced technologies which have enabled it to be applied mainly in the field of dry machining. It has also replaced traditional spray systems because of their negative environmental impact.
- the lubrication takes place by feeding a continuous air flow which provides not only a transport means for the oil as far as the lubrication point, but also a cooling means for those members to be lubricated and for the lubrication system.
- the oil injected into the air flow at regular intervals, covers the surfaces to be lubricated, so reducing friction and wear.
- the known devices provides the mixture of air and oil in pressure at a temperature that is too high to both lubricate and cool down the working zone.
- An object of the present invention is therefore to provide an air/oil lubrication device which represents an improvement over the known art, the device being able to provide to the lubricating zone an air-oil mixture flow with a controlled temperature, that can also cool down the temperature of the working zone.
- FIGS. 1 , 2 and 3 are respectively a front, side and rear view of the device of the present invention
- FIG. 4 is an exploded view of a modular oil/air mixer element of the present invention.
- FIG. 5 shows a schematic circuit of the modular mixer element.
- the reservoir comprises an element (for example of float type) for sensing the fluid level within it, and a filter 5 associated with an aperture 6 for feeding lubricant into the reservoir.
- the fixing plate 3 comprises a conduit connecting one end of the reservoir to the suction port of a (preferably high pressure) pump 6 fixed below the plate.
- the conduit feeds lubricant fluid from the reservoir 2 to the suction port 7 .
- the pump 6 comprises a first hydraulic block 6 A for pumping the fluid via a cylinder 9 , and a second pneumatic block 6 B for operating the cylinder 9 .
- the pump delivers oil with a pressure between 10 and 100 bar to the delivery line 18 .
- the pump is not present and the delivery line 18 is fed directly form an exit of the reservoir containing the lubricant pressurized through known pneumatic systems.
- a series of modular elements 50 A, B, C, D, E are mounted resting one on another ( FIG. 1 ) and fixed together and to the pump (if present) by a pair of through screws 61 housed in fixing holes provided through each modular element and at the pump.
- the pump has a surface 70 provided with a hole 18 communicating with a delivery port of the pump and a hole 33 communicating with the compressed air feed 31 .
- Each modular element ( FIG. 6 ) has a first passage 72 with its axis coinciding with the axis of the pump hole 33 and a second passage 73 with its axis coinciding with the axis of the pump hole 18 .
- the passages 72 and 73 are through-holes opening into both the surfaces 74 and 75 of the modular element.
- each modular element When several modular elements are fixed to the pump as in FIG. 3 , the passages 72 and 73 of each modular element define a pressurized main oil conduit 81 and a compressed air main conduit 80 connected respectively to the delivery port of the pump 6 and to a compressed air source or feed 31 .
- Each modular element 50 draws from these main conduits the compressed air and pressurized oil required for its operation.
- each modular element 50 the schematic circuit of each modular element 50 is shown in FIG. 4 . From this it can be seen that the lubricant delivered by the pump 6 (or from the reservoir in pressure) passes through the conduit 81 to the flow regulator 84 which regulates the entering oil quantity.
- the flow regulator 84 has a needle valving element 84 A on which a graduated scale 84 B and an operating knob 84 C are mounted.
- the outlet line 90 from the flow regulator 84 opens towards a mixing element 88 .
- the mixing element can be directly integrated in the module or can be located in a distant position from the module.
- the line 84 is intercepted by a shut-off element which, in the example, is a pilot piston 82 coupled to a spring-loaded valve 89 controlled by a solenoid valve 83 .
- the conduit 90 also presents a branch connecting it to an anti-drip piston 87 further connected to the compressed air feed.
- the conduit 80 communicates via the passage 72 with an air flow adjustment cock 85 , the outlet of which opens into the mixing element 88 via a conduit 810 .
- the cock 85 also presents a needle valving element 85 A having a head 85 B enabling it to be operated.
- conduit 810 is intercepted by a further pilot piston 82 with a spring-loaded valve 89 also controlled by the solenoid valve 83 .
- the entry conduit 831 of the solenoid valve 83 (optional, and not present for example in the elements 50 D. 50 E) communicates with the compressed air conduit 80 . It is able to connect a conduit 832 controlling the pilot pistons 82 to a discharge line 833 (pistons 2 open and lines 86 and 810 operative), or to the entry conduit 831 (pistons 2 closed and lines 86 and 810 inoperative).
- the mixing element 88 is essentially a nozzle which can be provided directly on each module 50 or integrated in each module 50 ( FIG. 4 ), or can be connected to the respective module via suitable air and lubricant pipes T which bring it directly in proximity to the point at which lubrication is required. In the first case a single air/oil pipe is sufficient, extending from the module to the position of use.
- air cock 85 could also not be provided. Each module could then be fed by a different air source, the conduit 80 hence being absent.
- the pump 6 pressurizes the lubricant fluid (for example oil) withdrawn from the reservoir 2 .
- the pump is operated by compressed air which is provided by the compressed air source 31 . It feeds both air and oil to each of the modules 50 fixed to it in series, via the main conduits 80 and 81 formed by passages provided directly within each of the modules and coupled together by means of gaskets 73 A, 73 B.
- the various modules are fixed together by screws 61 passing through suitable holes 8 provided in each module.
- the modules can be feed with the lubricant in pressure coming directly from the pressurized reservoir.
- the reservoir containing the lubricant is pressurized in a known manner, for example by a pneumatic pressurization system.
- Each module provides for mixing a fluid quantity adjustable by the flow regulator 84 .
- the air quantity delivered by each module can also be adjusted, by means of the cock 85 .
- a vortex tube 900 is provided in the conduit 810 of each module ( FIG. 5 ) to regulate the temperature of the air fed to the nozzle 88 .
- the vortex tube is housed in the module or directly realized in it. In this manner, the temperature of the air fed to the nozzle 88 can be regulated by a suitable regulator screw. This enables a valid cooling effect to be achieved in addition to lubrication.
Abstract
A minimal lubrication device including a storage reservoir for a lubricant fluid, a pressurizer to pressurize the lubricant and a feeder to feed the lubricant in pressure to at least a modular element. The modular element including a lubricating conduit intercepted by a flow regulator and a compressed air conduit. The lubricating conduit and the compressed air conduit being coupled with an air-lubricant mixing element. On the compressed air conduit upstream to the mixing element a vortex tube is provided, to cool down the temperature of the air flow at which the lubricant is mixed.
Description
- The present invention relates to a minimal air/oil lubrication device. More particularly, it relates to a modular device.
- Air/oil lubrication represents a relatively recent reality, and is the result of the introduction of advanced technologies which have enabled it to be applied mainly in the field of dry machining. It has also replaced traditional spray systems because of their negative environmental impact.
- Essentially, the lubrication takes place by feeding a continuous air flow which provides not only a transport means for the oil as far as the lubrication point, but also a cooling means for those members to be lubricated and for the lubrication system.
- The oil, injected into the air flow at regular intervals, covers the surfaces to be lubricated, so reducing friction and wear.
- The known devices provides the mixture of air and oil in pressure at a temperature that is too high to both lubricate and cool down the working zone.
- An object of the present invention is therefore to provide an air/oil lubrication device which represents an improvement over the known art, the device being able to provide to the lubricating zone an air-oil mixture flow with a controlled temperature, that can also cool down the temperature of the working zone.
- These and other objects are attained by an air/oil lubrication device in accordance with the teachings of the accompanying claims.
- Further characteristics and advantages of the invention will be more apparent from the description of a preferred but non-exclusive embodiment of the air/oil lubrication device, illustrated by way of non-limiting example in the accompanying drawings, in which:
-
FIGS. 1 , 2 and 3 are respectively a front, side and rear view of the device of the present invention; -
FIG. 4 is an exploded view of a modular oil/air mixer element of the present invention; -
FIG. 5 shows a schematic circuit of the modular mixer element. - With reference to said figures, these show an air/oil lubrication device indicated overall by the
reference numeral 1. - It comprises a lubricant
fluid storage reservoir 2 supported by aplate 3 to which the device is fixed. The reservoir comprises an element (for example of float type) for sensing the fluid level within it, and afilter 5 associated with anaperture 6 for feeding lubricant into the reservoir. Thefixing plate 3 comprises a conduit connecting one end of the reservoir to the suction port of a (preferably high pressure)pump 6 fixed below the plate. - The conduit feeds lubricant fluid from the
reservoir 2 to the suction port 7. - The
pump 6 comprises a firsthydraulic block 6A for pumping the fluid via a cylinder 9, and a secondpneumatic block 6B for operating the cylinder 9. - The pump delivers oil with a pressure between 10 and 100 bar to the
delivery line 18. - In an alternative embodiment the pump is not present and the
delivery line 18 is fed directly form an exit of the reservoir containing the lubricant pressurized through known pneumatic systems. - Below the pump a series of
modular elements 50A, B, C, D, E are mounted resting one on another (FIG. 1 ) and fixed together and to the pump (if present) by a pair of throughscrews 61 housed in fixing holes provided through each modular element and at the pump. - The pump has a
surface 70 provided with ahole 18 communicating with a delivery port of the pump and ahole 33 communicating with thecompressed air feed 31. - Each modular element (
FIG. 6 ) has afirst passage 72 with its axis coinciding with the axis of thepump hole 33 and asecond passage 73 with its axis coinciding with the axis of thepump hole 18. Thepassages surfaces - When several modular elements are fixed to the pump as in
FIG. 3 , thepassages main oil conduit 81 and a compressed airmain conduit 80 connected respectively to the delivery port of thepump 6 and to a compressed air source or feed 31. - Each
modular element 50 draws from these main conduits the compressed air and pressurized oil required for its operation. - In particular, the schematic circuit of each
modular element 50 is shown inFIG. 4 . From this it can be seen that the lubricant delivered by the pump 6 (or from the reservoir in pressure) passes through theconduit 81 to theflow regulator 84 which regulates the entering oil quantity. Theflow regulator 84 has aneedle valving element 84A on which a graduatedscale 84B and anoperating knob 84C are mounted. Theoutlet line 90 from theflow regulator 84 opens towards amixing element 88. The mixing element can be directly integrated in the module or can be located in a distant position from the module. Theline 84 is intercepted by a shut-off element which, in the example, is apilot piston 82 coupled to a spring-loadedvalve 89 controlled by asolenoid valve 83. Theconduit 90 also presents a branch connecting it to ananti-drip piston 87 further connected to the compressed air feed. - When air is present in the
conduit 80, thepiston 87 takes the position shown by the arrow F (opposite to that illustrated, with thespring 87A compressed). When theconduit 80 is without pressure thespring 87A is extended and the piston returns to the illustrated position to draw the lubricant present in theconduit 90 into achamber 87B. - The
conduit 80 communicates via thepassage 72 with an airflow adjustment cock 85, the outlet of which opens into themixing element 88 via aconduit 810. Thecock 85 also presents aneedle valving element 85A having ahead 85B enabling it to be operated. - As in the preceding case, the
conduit 810 is intercepted by afurther pilot piston 82 with a spring-loadedvalve 89 also controlled by thesolenoid valve 83. - The
entry conduit 831 of the solenoid valve 83 (optional, and not present for example in theelements 50D. 50E) communicates with thecompressed air conduit 80. It is able to connect aconduit 832 controlling thepilot pistons 82 to a discharge line 833 (pistons 2 open andlines pistons 2 closed andlines - The
mixing element 88 is essentially a nozzle which can be provided directly on eachmodule 50 or integrated in each module 50 (FIG. 4 ), or can be connected to the respective module via suitable air and lubricant pipes T which bring it directly in proximity to the point at which lubrication is required. In the first case a single air/oil pipe is sufficient, extending from the module to the position of use. - In concluding the device description it should be noted that if the
solenoid valve 83 is absent, the holes provided in eachmodular element 50 which derive from theconduits plate 150. In that case thepilot pistons 82 are always in a position such as to enable fluids to pass into theconduits - In addition the
air cock 85 could also not be provided. Each module could then be fed by a different air source, theconduit 80 hence being absent. - The device operation is apparent to the expert of the art from the aforegoing description, and is as follows.
- The
pump 6 pressurizes the lubricant fluid (for example oil) withdrawn from thereservoir 2. The pump is operated by compressed air which is provided by thecompressed air source 31. It feeds both air and oil to each of themodules 50 fixed to it in series, via themain conduits gaskets screws 61 passing throughsuitable holes 8 provided in each module. - In a different embodiment the modules can be feed with the lubricant in pressure coming directly from the pressurized reservoir. In this case the reservoir containing the lubricant is pressurized in a known manner, for example by a pneumatic pressurization system.
- Each module provides for mixing a fluid quantity adjustable by the
flow regulator 84. The air quantity delivered by each module can also be adjusted, by means of thecock 85. - In this manner a precise adjustment of the oil quantity delivered by each
modular element 50 is achieved and, by means of a possible stroke counter for the piston 9 of thepump 6, the oil quantity fed to the group of modular elements or to each individually tested element can be monitored during tests. In this respect, at a stage prior to the use of the device onemodular element 50 could be activated at a time and the delivered oil quantity (measured by a piston stroke counter) could be regulated. In this manner a precise adjustment of the oil quantity delivered by each element can be achieved, so combining the advantages of a positive displacement pumping system with those of a pressurized reservoir system. - According to the present invention, a
vortex tube 900 is provided in theconduit 810 of each module (FIG. 5 ) to regulate the temperature of the air fed to thenozzle 88. The vortex tube is housed in the module or directly realized in it. In this manner, the temperature of the air fed to thenozzle 88 can be regulated by a suitable regulator screw. This enables a valid cooling effect to be achieved in addition to lubrication.
Claims (10)
1. A minimal lubrication device comprising:
a storage reservoir for a lubricant fluid,
a modular element,
means to pressurize the lubricant and means to feed the lubricant in pressure to at least the modular element,
the modular element comprising a lubricating conduit intercepted by a flow regulator and a compressed air conduit, the lubricating conduit and the compressed air conduit being coupled with an air-lubricant mixing element, wherein on the compressed air conduit positioned upstream the mixing element a vortex tube is provided, to cool down the temperature of the air flow at which the lubricant is mixed.
2. A device as claimed in claim 1 , wherein the vortex tube is integrated in the modular element.
3. A device as claimed in claim 1 , wherein the mixing element is integrated in the modular element.
4. A device as claimed in claim 1 , wherein the flow regulator is a needle flow regulator.
5. A device as claimed in claim 1 , wherein said means to pressurize the lubricant comprise a high pressure pump and or pneumatic pressurization means of the reservoir.
6. A device as claimed in claim 1 , wherein said modular element comprises a solenoid valve controlling a shut-off device for the oil flow and/or the air flow directed to said mixer element.
7. A device as claimed in claim 1 , wherein said modular element presents a cock for adjusting the air flow fed into said mixer element.
8. A device as claimed in claim 1 , wherein said modular element presents an anti-drip element adapted to store the oil if compressed air is absent.
9. A device as claimed in claim 1 , wherein said modular element comprises fixing means enabling the modular element to be fixed to other identical modular elements and/or to said high pressure pump.
10. A device as claimed in claim 1 , wherein several modular elements fixed together define a pressurized main oil conduit (81) and/or a main compressed air conduit connected respectively to the pump delivery port or to the pressurized reservoir, and to a compressed air source, each module drawing compressed air and pressurized lubricant from said conduits.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI2009A002084A IT1396624B1 (en) | 2009-11-26 | 2009-11-26 | MINIMAL LUBRICATION DEVICE |
ITMI2009A002084 | 2009-11-26 | ||
IT001520A ITMI20101520A1 (en) | 2010-08-06 | 2010-08-06 | MINIMAL LUBRICATION DEVICE WITH COOLING |
ITMI2010A001520 | 2010-08-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20110120803A1 true US20110120803A1 (en) | 2011-05-26 |
Family
ID=43627031
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/952,444 Abandoned US20110120803A1 (en) | 2009-11-26 | 2010-11-23 | Minimal lubrication device |
Country Status (5)
Country | Link |
---|---|
US (1) | US20110120803A1 (en) |
EP (1) | EP2333396A1 (en) |
CN (1) | CN102080762A (en) |
BR (1) | BRPI1004731A2 (en) |
RU (1) | RU2010148152A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2690341A1 (en) | 2012-07-27 | 2014-01-29 | Nex Flow Air Products Corp. | Apparatus and method for cooling and lubrication |
US20170363252A1 (en) * | 2016-06-15 | 2017-12-21 | Dropsa S.P.A. | Minimal lubrication device with fine adjustment of the flow of oil |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20120289A1 (en) * | 2012-02-27 | 2013-08-28 | Dropsa Spa | LUBRICATION DEVICE WITH FLUID LUBRICANT FLOW RATE ADJUSTMENT |
JP6999423B2 (en) * | 2015-05-14 | 2022-01-18 | エンメ・ドッピオヴ・エンメ スクミエランラーゲン ソチエタ ア リスポンサビリタ リミタータ | Minimum continuous flow rate oil-air lubrication method and system by electronic adjustment and control |
CN106270353A (en) * | 2016-08-31 | 2017-01-04 | 常州金坛群英机械有限公司 | Steel ball automatic cold header Pneumatic component |
CN110293444A (en) * | 2019-07-20 | 2019-10-01 | 成都飞机工业(集团)有限责任公司 | A kind of non-pump type micro lubricating equipment |
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US3995717A (en) * | 1974-09-19 | 1976-12-07 | Houdaille Industries, Inc. | Sequential lubrication distributor and lubricant injector therefor |
US4859987A (en) * | 1987-12-11 | 1989-08-22 | Casco Products Corporation | Apparatus and method for monitoring liquid levels |
US4919232A (en) * | 1989-05-12 | 1990-04-24 | Hugh Lofton | Cold lubricant misting device and method |
US5024584A (en) * | 1987-11-30 | 1991-06-18 | Tetra Dev-Co | Pump unit with adjustable piston stroke length |
US5042618A (en) * | 1990-08-09 | 1991-08-27 | Trico Mfg. Corp. | Liquid/gas delivery system |
US5205378A (en) * | 1990-12-31 | 1993-04-27 | Boelkins Wallace G | Pulse-action mist lubrication system |
US5275539A (en) * | 1992-06-09 | 1994-01-04 | Outboard Marine Corporation | Internal combustion engine oil pump |
US5368746A (en) * | 1991-10-29 | 1994-11-29 | Edd D. Gryder | Environmentally beneficial bypass filter system for use with low pressure centrifugal refrigeration equipment |
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US5524729A (en) * | 1990-12-31 | 1996-06-11 | Uni-Mist, Inc. | Pulse-action mist lubrication system |
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US7665578B2 (en) * | 2004-04-20 | 2010-02-23 | Acculube Manufacturing Gmbh | Device and procedure for providing a fine mist of oil |
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CN2277020Y (en) * | 1996-06-25 | 1998-03-25 | 冶金工业部北京冶金设备研究院 | Automatic spraying lubricating device |
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KR20000005672A (en) * | 1998-06-12 | 2000-01-25 | 토마스 더블유. 버크맨 | Pumpless Micro-flow Control Fluid Dispensing System and Method |
-
2010
- 2010-11-23 US US12/952,444 patent/US20110120803A1/en not_active Abandoned
- 2010-11-24 EP EP10192431A patent/EP2333396A1/en not_active Withdrawn
- 2010-11-25 RU RU2010148152/06A patent/RU2010148152A/en not_active Application Discontinuation
- 2010-11-25 BR BRPI1004731-0A patent/BRPI1004731A2/en not_active Application Discontinuation
- 2010-11-26 CN CN2010106087848A patent/CN102080762A/en active Pending
Patent Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
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US3604535A (en) * | 1969-04-23 | 1971-09-14 | Hardinge Brothers Inc | Automatic oiling system |
US3995717A (en) * | 1974-09-19 | 1976-12-07 | Houdaille Industries, Inc. | Sequential lubrication distributor and lubricant injector therefor |
US5024584A (en) * | 1987-11-30 | 1991-06-18 | Tetra Dev-Co | Pump unit with adjustable piston stroke length |
US4859987A (en) * | 1987-12-11 | 1989-08-22 | Casco Products Corporation | Apparatus and method for monitoring liquid levels |
US4919232A (en) * | 1989-05-12 | 1990-04-24 | Hugh Lofton | Cold lubricant misting device and method |
US5042618A (en) * | 1990-08-09 | 1991-08-27 | Trico Mfg. Corp. | Liquid/gas delivery system |
US5524729A (en) * | 1990-12-31 | 1996-06-11 | Uni-Mist, Inc. | Pulse-action mist lubrication system |
US5205378A (en) * | 1990-12-31 | 1993-04-27 | Boelkins Wallace G | Pulse-action mist lubrication system |
US5542498A (en) * | 1990-12-31 | 1996-08-06 | Uni-Mist, Inc. | Pulse action mist lubrication system |
US5368746A (en) * | 1991-10-29 | 1994-11-29 | Edd D. Gryder | Environmentally beneficial bypass filter system for use with low pressure centrifugal refrigeration equipment |
US5275539A (en) * | 1992-06-09 | 1994-01-04 | Outboard Marine Corporation | Internal combustion engine oil pump |
US5513722A (en) * | 1995-03-10 | 1996-05-07 | Foltz; Donald R. | Compressed air lubricator |
US6065689A (en) * | 1996-05-21 | 2000-05-23 | Alemite Corporation | Mist generating head |
US6131471A (en) * | 1997-09-05 | 2000-10-17 | American Standard Inc. | Liquid level sensor |
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US20020144865A1 (en) * | 2001-04-10 | 2002-10-10 | Lincoln Industrial Corporation | Modular lubricating system and injector |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2690341A1 (en) | 2012-07-27 | 2014-01-29 | Nex Flow Air Products Corp. | Apparatus and method for cooling and lubrication |
US9303813B2 (en) | 2012-07-27 | 2016-04-05 | Nex Flow Air Products Corp. | Apparatus and method for cooling and lubrication |
US20170363252A1 (en) * | 2016-06-15 | 2017-12-21 | Dropsa S.P.A. | Minimal lubrication device with fine adjustment of the flow of oil |
US10539269B2 (en) * | 2016-06-15 | 2020-01-21 | Dropsa S.P.A. | Minimal lubrication device with fine adjustment of the flow of oil |
Also Published As
Publication number | Publication date |
---|---|
CN102080762A (en) | 2011-06-01 |
BRPI1004731A2 (en) | 2013-03-12 |
EP2333396A1 (en) | 2011-06-15 |
RU2010148152A (en) | 2012-05-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: DROPSA S.P.A., ITALY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DIVISI, WALTER;REEL/FRAME:025396/0843 Effective date: 20101028 |
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